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Consider the Pelton wheel turbine illustrated in Figs. 12.24, 12.25, 12.26, and 12.27. This kind of turbine is used to drive the oscillating sprinkler shown in Video V12.4. Explain how this kind of sprinkler is started, and subsequently operated at constant oscillating speed. What is the physical significance of the zero torque condition with the Pelton wheel rotating?
If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water. Determine the length required for the heat exchanger.
A Rankine cycle power plant is being developed to operate an irrigation system. In this power plant solar energy will be used to boil a low boiling point fluid within glazed flat plate solar collectors. The working fluid that has been selected is the..
10 kg of air in a piston-cylinder initially at 0.5 Mpa, 227 Celsius, undergoes two processes in series. constant temperature expansion to triple the volume. constant volume heating to the initial p = 0.5 MPa.
A manometer containing oil (r = 850 kg/m3) is attached to a tank filled with air. If the oil-level difference between the two columns is 60 cm and the atmospheric pressure is 98 kPa, determine the absolute pressure of the air in the tank.
What voltage must be applied between the filament and target so that electrons interacting with molecules at the point marked SS (sample source) will have 70 e V of kinetic energy?
we have a mixture that is 20 mol propane 35 mol n-butane and 45 mol n-hexane. if a flash drum operates at 400 kpa what
If the rotor operates at resonance, how long will it take to activate the limit switch? Assume the initial displacement and velocity of the rotor perpendicular to the shaft to be zero.
A small dam, which may be idealized by a large slab 1.2 m thick, is to be completely poured in a short period of time. The hydration of the concrete results in the equivalent of a distributed source of constant strength of 100 W/m3.
For this flow field, what is the magnitude of the average velocity of the fluid crossing the surface OA of Fig. P6.23? Assume that the velocities are in feet per second when x and y are in feet
When 2140 J of heat flows into the gas, the internal energy of the gas increases by 1580 J. What is the distance s through which the piston rises?
a 4000 lb car traveling at 60 mph decelerates at a constant rate and comes up to a stop over a distance of 200 feet.
The mass m slides into the stepped elastic bar with the velocity v. Derive the expression for the maximum dynamic stress in the bar.
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